htop/pcp/screens/devices

#
# pcp-htop(1) configuration file - see pcp-htop(5)
#

[disks]
heading = Disks
caption = Disk devices

diskdev.heading = Device
diskdev.metric = disk.dev.read
diskdev.instances = true
diskdev.format = device
diskdev.width = -8

total.heading = TPS
total.metric = rate(disk.dev.read) + rate(disk.dev.write) + rate(disk.dev.discard)
total.caption = Rate of read requests

read.heading = RR/S
read.metric = rate(disk.dev.read)
read.caption = Rate of read requests

read_bytes.heading = RRB/S
read_bytes.metric = rate(disk.dev.read_bytes)
read_bytes.caption = Read throughput from the device

read_merge.heading = RRQM/S
read_merge.metric = rate(disk.dev.read_merge)
read_merge.caption = Rate reads merged before queued
read_merge.default = false

read_merge_pct.heading = RRQM%
read_merge_pct.metric = 100 * rate(disk.dev.read_merge) / rate(disk.dev.read)
read_merge_pct.caption = Percentage reads merged before queued
read_merge_pct.format = percent

read_await.heading = RAWAIT
read_await.metric = delta(disk.dev.read_rawactive) / delta(disk.dev.read)
read_await.caption = Average time read requests queued and serviced
read_await.default = false

read_avqsz.heading = RARQSZ
read_avqsz.metric = rescale(delta(disk.dev.read_bytes), "kbyte") / delta(disk.dev.read)
read_avqsz.caption = Average I/O request size for reads to the device
read_avqsz.default = false

write.heading = WR/S
write.metric = rate(disk.dev.write)
write.caption = Rate of write requests

write_bytes.heading = WRB/S
write_bytes.metric = rate(disk.dev.write_bytes)
write_bytes.caption = Write throughput to the device

write_merge.heading = WRQM/S
write_merge.metric = rate(disk.dev.write_merge)
write_merge.caption = Rate writes merged before queued
write_merge.default = false

write_merge_pct.heading = WRQM%
write_merge_pct.metric = 100 * rate(disk.dev.write_merge)  / rate(disk.dev.write)
write_merge_pct.caption = Percentage writes merged before queued
write_merge_pct.format = percent

write_await.heading = WAWAIT
write_await.metric = delta(disk.dev.write_rawactive) / delta(disk.dev.write)
write_await.caption = Average time write requests queued and serviced
write_await.default = false

write_avqsz.heading = WARQSZ
write_avqsz.metric = rescale(delta(disk.dev.write_bytes), "kbyte") / delta(disk.dev.write)
write_avqsz.caption = Average I/O request size for writes to the device
write_avqsz.default = false

discard.heading = DR/S
discard.metric = rate(disk.dev.discard)
discard.caption = Rate of discard requests

discard_bytes.heading = DRB/S
discard_bytes.metric = rate(disk.dev.discard_bytes)
discard_bytes.caption = Discard request throughput
discard_bytes.default = false

discard_merge.heading = DRQM/S
discard_merge.metric = rate(disk.dev.discard_merge)
discard_merge.caption = Rate discards merged before queued
discard_merge.default = false

discard_merge_pct.heading = DRQM%
discard_merge_pct.metric = 100 * rate(disk.dev.discard_merge)  / rate(disk.dev.discard)
discard_merge_pct.caption = Percentage discards merged before queued
discard_merge_pct.format = percent
discard_merge_pct.default = false

discard_await.heading = DAWAIT
discard_await.metric = delta(disk.dev.discard_rawactive) / delta(disk.dev.discard)
discard_await.caption = Average time discard requests queued and serviced
discard_await.default = false

discard_avqsz.heading = DARQSZ
discard_avqsz.metric = rescale(delta(disk.dev.discard_bytes), "kbyte") / delta(disk.dev.discard)
discard_avqsz.caption = Average I/O request size for discards to the device
discard_avqsz.default = false

flush.heading = F/S
flush.metric = rate(disk.dev.flush)
flush.default = false
flush.caption = Flushes per second

flush_await.heading = FAWAIT
flush_await.metric = delta(disk.dev.flush_rawactive) / delta(disk.dev.flush)
flush_await.caption = Average time that flush requests were queued and serviced
flush_await.default = false

qlen.heading = AQU-SZ
qlen.metric = rate(disk.dev.read_rawactive) + rate(disk.dev.write_rawactive)
qlen.caption = Average read and write I/O queue length to the device

util.heading = UTIL%
util.metric = 100 * rate(disk.dev.avactive)
util.caption = Perentage of time device was busy processing requests
util.format = percent